Medium severity · published Oct 3, 2026
CVE-2026-105118
OpenAM before 16.1.3 Open Redirect via Unverified id_token_hint in endSession
4.7
CVSS
0.1%
EPSS
No
On KEV
Description
OpenAM before 16.1.3 contains an open redirect vulnerability that allows unauthenticated attackers to redirect users by supplying an unverified id_token_hint to the /oauth2/connect/endSession endpoint. Attackers can name any realm client in a forged hint to redirect victims to any registered post-logout URI, enabling phishing that borrows the OpenAM host's trust.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
OpenAM · OpenIdentityPlatform
before 16.1.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-105118
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-105118
vendor-advisory
https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-6f8c-crwq-jqm3
third-party-advisory
https://www.vulncheck.com/advisories/openam-before-16.1.3-open-redirect-via-unverified-id-token-hint-in-endsession
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